Abstract
A three-dimensional particle image velocimetry (3-DPIV) system is developed to measure the three-dimensional local flow properties of gas-liquid and gas-liquid-solid fluidization systems. The 3-DPIV system requires one camera to simultaneous record orthogonal views of the flow field created by a special optical arrangement. The 3-DPIV has been successfully calibrated and is capable of providing qualitative and quantitative flow information including three-dimensional, full-field, instantaneous velocities, accelerations and holdups of each phase. In this study, sample results of the application of the 3-DPIV technique to a three-dimensional gas-liquid-solid fluidization system operating in the dispersed bubble flow regime demonstrate that the 3-DPIV technique is an effective instrument in studying the local, transient flow phenomena in multiphase systems.
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Abbreviations
- D :
-
focal length of camera
- d a :
-
horizontal offset
- Δl :
-
particle displacement
- Δt :
-
time interval between consecutive video frames
- U :
-
particle velocity
- Ul :
-
superficial liquid velocity
- Ug :
-
superficial gas velocity
- V :
-
virtual viewpoint of orthogonal projection
- x, y, z :
-
spatial coordinates
- z a :
-
vertical offset
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This work was supported by the NSF Grant CTS-9200793.
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Reese, J., Chen, R.C. & Fan, L.S. Three-dimensional particle image velocimetry for use in three-phase fluidization systems. Experiments in Fluids 19, 367–378 (1995). https://doi.org/10.1007/BF00190253
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DOI: https://doi.org/10.1007/BF00190253